Good tip.
I just did this in my 14 Pro while I await the 15 Plus to be delivered.
It's jarring at first but I think I got used to it now after a few hours. I'll see if I can live with it..
You get used to it. 13 Pro to 15 Plus here. I was in the “cant live without 120 HZ” camp. But it’s just fine and I adjusted quickly. Despite the loss of promotion, I am comforted by the ridiculous battery life 😎